Mario Party: The Top 100 amiibo features

Tap compatible amiibo™ figures to receive in-game bonuses on Minigame
Island. Stand on a circle marked with the amiibo symbol and tap to get
10 coins. If the amiibo circle is occupied by a Goomba or Koopa
Troopa, tap their respective amiibo figures for 50 coins! If your life
reaches 0, you can tap compatible amiibo to restore one life. Each
compatible amiibo can be scanned once per day.

Tap the Goomba or Koopa Troopa amiibo™ figures at the Minigame Pack
selection screen in Minigame Match or Championship Battles for a
shortcut to unlocking the Goomba Minigame Pack or the Koopa Troopa
Pack.